Are We Falling Off the Climate Precipice?

Posted on Dec 19, 2013

“The Arctic is warming faster than anywhere else on the planet,” climate scientist James Hansen has said. “There are potential irreversible effects of melting the Arctic sea ice. If it begins to allow the Arctic Ocean to warm up, and warm the ocean floor, then we’ll begin to release methane hydrates. And if we let that happen, that is a potential tipping point that we don’t want to happen. If we burn all the fossil fuels then we certainly will cause the methane hydrates, eventually, to come out and cause several degrees more warming, and it’s not clear that civilization could survive that extreme climate change.”

Yet, long before humanity has burned all fossil fuel reserves on the planet, massive amounts of methane will be released. While the human body is potentially capable of handling a six to nine degree Celsius rise in the planetary temperature, the crops and habitat we use for food production are not. As McPherson put it, “If we see a 3.5 to 4C baseline increase, I see no way to have habitat. We are at .85C above baseline and we’ve already triggered all these self-reinforcing feedback loops.”

He adds: “All the evidence points to a locked-in 3.5 to 5 degree C global temperature rise above the 1850 ‘norm’ by mid-century, possibly much sooner. This guarantees a positive feedback, already underway, leading to 4.5 to 6 or more degrees above ‘norm’ and that is a level lethal to life. This is partly due to the fact that humans have to eat and plants can’t adapt fast enough to make that possible for the seven to nine billion of us—so we’ll die.”

If you think McPherson’s comment about lack of adaptability goes over the edge, consider that the rate of evolution trails the rate of climate change by a factor of 10,000, according to a paper in the August 2013 issue of Ecology Letters. Furthermore, David Wasdel, director of the Apollo-Gaia Project and an expert on multiple feedback dynamics, says, “We are experiencing change 200 to 300 times faster than any of the previous major extinction events.”

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Wasdel cites with particular alarm scientific reports showing that the oceans have already lost 40% of their phytoplankton, the base of the global oceanic food chain, because of climate-change-induced acidification and atmospheric temperature variations. (According to the Center for Ocean Solutions: “The oceans have absorbed almost one-half of human-released CO2 emissions since the Industrial Revolution. Although this has moderated the effect of greenhouse gas emissions, it is chemically altering marine ecosystems 100 times more rapidly than it has changed in at least the last 650,000 years.”)

“This is already a mass extinction event,” Wasdel adds. “The question is, how far is it going to go? How serious does it become? If we are not able to stop the rate of increase of temperature itself, and get that back under control, then a high temperature event, perhaps another 5-6 degrees [C], would obliterate at least 60% to 80% of the populations and species of life on Earth.”

What Comes Next?

In November 2012, even Jim Yong Kim, president of the World Bank Group (an international financial institution that provides loans to developing countries), warned that “a 4C warmer world can, and must be, avoided. Lack of action on climate change threatens to make the world our children inherit a completely different world than we are living in today.”

A World Bank-commissioned report warned that we are indeed on track to a “4C world” marked by extreme heat waves and life-threatening sea-level rise.

The three living diplomats who have led U.N. climate change talks claim there is little chance the next climate treaty, if it is ever approved, will prevent the world from overheating. “There is nothing that can be agreed in 2015 that would be consistent with the 2 degrees,” says Yvo de Boer, who was executive secretary of the United Nations Framework Convention on Climate Change in 2009, when attempts to reach a deal at a summit in Copenhagen crumbled. “The only way that a 2015 agreement can achieve a 2-degree goal is to shut down the whole global economy.”

Atmospheric and marine scientist Ira Leifer is particularly concerned about the changing rainfall patterns a recently leaked IPCC draft report suggested for our future: “When I look at what the models predicted for a 4C world, I see very little rain over vast swaths of populations. If Spain becomes like Algeria, where do all the Spaniards get the water to survive? We have parts of the world which have high populations which have high rainfall and crops that exist there, and when that rainfall and those crops go away and the country starts looking more like some of North Africa, what keeps the people alive?”

The IPCC report suggests that we can expect a generalized shifting of global rain patterns further north, robbing areas that now get plentiful rain of future water supplies. History shows us that when food supplies collapse, wars begin, while famine and disease spread. All of these things, scientists now fear, could happen on an unprecedented scale, especially given the interconnected nature of the global economy.

“Some scientists are indicating we should make plans to adapt to a 4C world,” Leifer comments. “While prudent, one wonders what portion of the living population now could adapt to such a world, and my view is that it’s just a few thousand people [seeking refuge] in the Arctic or Antarctica.”

Not surprisingly, scientists with such views are often not the most popular guys in the global room. McPherson, for instance, has often been labeled “Guy McStinction”—to which he responds, “I’m just reporting the results from other scientists. Nearly all of these results are published in established, esteemed literature. I don’t think anybody is taking issue with NASA, or Nature, or Science, or the Proceedings of the National Academy of Sciences. [Those] and the others I report are reasonably well known and come from legitimate sources, like NOAA [the National Oceanic and Atmospheric Administration], for example. I’m not making this information up, I’m just connecting a couple of dots, and it’s something many people have difficulty with.”